We are looking for engineers to join our US Marine Corps advance technology development team. Are you a Software Engineer looking to be part of something that is truly unique - not just a job, but a mission? We are in search of a computer science major, with 3 years or more experience with software code, optimize and build updated code fixes for speed and efficiency in an R&D setting. This position has a key responsibility in running a test bench lab and ensuring testing is smooth. Responsibilities: To create code and fix defects using an Agile process for a complex component of this weapon system using the software development life and test cycle. To measure the computer processing time usage and come up with better methods of storage space utilization, network loading and process throughput for the DoD Program Office. To enable designing, coding and maintenance of software support tools, testing and models. Primary work location will be in Fredericksburg, VA or Dahlgren, VA (with occasional telecommute or travel opportunities.) We are fun, collaborative, supportive and our goal is to find great people who want to stay hands on in development yet have input in process improvements. We work hand in hand with the government customers in integrated teams. We take care of our people and joining Amentum means you are not joining one contract but a team of many contracts, providing unique job security. No clearance required to apply, but the position requires a SECRET clearance to start. US Citizenship is required. Essential Responsibilities: Comprehensive knowledge in definition and management of software requirements, design, code, benchmark testing, debugging, software development lifecycle, architecture, and documentation. Plans, performs, and software design, coding, and testing. Minimum Requirements: US Citizen AND Bachelor's Degree (in one of these in Computer Science, Math, Engineering, or Related Field) and 3 years of experience or Masters in one of these degrees and 2 years of experience. Two years of program/project level experience of software design and: Two years of experience performing detailed and complex software design and development meeting sub millisecond timing requirements; Security clearance: ability to obtain a secret (no clearance required to apply). US Citizenship is required for employment. Preferred Qualifications: C++ or C# 2 years (Preferred) Experience in an Agile software development environment and methodologies Atlassian tool suites, Jira (for issue tracking) and Confluence (decision tracking); Source code tracking tools (i.e. Git, Bitbucket) ***The candidate will need to obtain Security+ within 2 months of starting the position *** ***Starting bonus may be available depending on ability to start quickly *** Compensation Details: $90,000-$140,000 The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws. Benefits Overview: Our health and welfare benefits are designed to support you and your priorities. Offerings include:

• Health, dental, and vision insurance
• Paid time off and holidays
• Retirement benefits (including 401(k) matching)
• Educational reimbursement
• Parental leave
• Employee stock purchase plan
• Tax-saving options
• Disability and life insurance
• Pet insurance

Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits. Original Posting: 09/15/2026 - Until Filled Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.